import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class ButtonEventApplet extends Applet implements ActionListener {

  Button button;

  public void init() {

    setLayout(new BorderLayout());

    button = new Button("Click Me!");
    button.addActionListener(this);
    add(button, BorderLayout.CENTER);
  }

  public void actionPerformed(ActionEvent e) {

    // do something when the button is pressed
    button.setEnabled(false);
  }
}